diff --git a/CHANGES b/CHANGES
index d205de9..a758fad 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4,7 +4,8 @@ Released 2.4.28 2016-11-xx
 Changes since 2.4.27:
 
 Lib/
-* 
+* added dummy method logging_file_class.flush() because
+  LDAPObject.unbind_ext_s() invokes it
 
 ----------------------------------------------------------------
 Released 2.4.27 2016-08-01
@@ -1290,4 +1291,4 @@ Released 2.0.0pre02 2002-02-01
 ----------------------------------------------------------------
 Released 1.10alpha3 2000-09-19
 
-$Id: CHANGES,v 1.394 2016/11/11 14:41:07 stroeder Exp $
+$Id: CHANGES,v 1.395 2016/11/11 14:42:18 stroeder Exp $
diff --git a/Lib/ldap/logger.py b/Lib/ldap/logger.py
index 16c4d63..d955c2e 100644
--- a/Lib/ldap/logger.py
+++ b/Lib/ldap/logger.py
@@ -13,4 +13,7 @@ def __init__(self,logging_level):
   def write(self,msg):
     logging.log(self._logging_level,msg[:-1])
 
+  def flush(self):
+    return
+
 logging_file_obj = logging_file_class(logging.DEBUG)